23749257 has 16 divisors (see below), whose sum is σ = 36377600. Its totient is φ = 13500432.

The previous prime is 23749249. The next prime is 23749261. The reversal of 23749257 is 75294732.

It is not a de Polignac number, because 23749257 - 2³ = 23749249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23749157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1338 + ... + 7020.

It is an arithmetic number, because the mean of its divisors is an integer number (2273600).

Almost surely, 2^23749257 is an apocalyptic number.

It is an amenable number.

23749257 is a deficient number, since it is larger than the sum of its proper divisors (12628343).

23749257 is a wasteful number, since it uses less digits than its factorization.

23749257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5892.

The product of its digits is 105840, while the sum is 39.

The square root of 23749257 is about 4873.3209416167. The cubic root of 23749257 is about 287.4418564209.

It can be divided in two parts, 237 and 49257, that added together give a palindrome (49494).

The spelling of 23749257 in words is "twenty-three million, seven hundred forty-nine thousand, two hundred fifty-seven".